Warnock was true to his word as the 19-year-old signed for the Millers this morning from near neighbours Sheffield United.
Having been on loan at Doncaster Rovers earlier in the season, Forte was eager to get out and play more first team games. He is blessed with great pace and can play either left side of midfield or direct as a striker and he goes straight into tomorrow's starting line up to partner Will Hoskins in attack.
Young Jonathan told the club's official site: "I am very happy to be here to get some first team football and more experience under my belt. I enjoyed my spell at Doncaster and now hopefully i'll be able to prove myself at Rotherham United.
The league position doesn't worry me, I will do my best to get them up the table. I'll be happy to play in any position but tomorrow i'll be playing up front alongside Will Hoskins who is the only player I know here. It would be nice to get off to a winning start tomorrow with a goal from me aswell."
MillersMad would echo that and wish Jonathan all the best in his spell with the Millers. Forte scored four goals in his time with Donny and has been given squad number 24 down at Millmoor.